Mitsubishi MELSEC Q Series Programming Manual page 437

(2) The following program turns Y40 ON or OFF, depending on the status of the 19th bit of the
2-word data (W0 and W1).
[Ladder Mode]
[Operation]
b31 b19
1 0 1 1 0 0 1 0 1 0 1 1 0 0 0 0
b31 b19
0 1 1 0 1 1 0 1 1 1 0 1 1 0 0 1
Remark
Programs using the bit test instruction can be rewritten as programs using bit
designation of word devices.
If the program in example (1) were changed to use bit designation of a word
device, it would appear as follows:
D0.A
[List Mode]
Step
b16 b15
1 0 1 1 0 1 1 1 0 1 1 1 0 1 1 0
Turns Y40 OFF since b19 is "0."
b16 b15
1 0 1 0 1 1 0 0 0 0 1 0 1 1 0 1
Turns Y40 ON since b19 is "1."
M0
Designation of b10 of D0
TEST(P),DTEST(P)
Instruction Device
b0
b0
M0 turns ON/OFF depending on the ON/OFF
status of b10 of D0 (D0.A).
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